*{
    margin: 0;
    padding: 0;
}
/* 头部 */
header{
    height: 100px;
    overflow: hidden;
}
header .wrapper{
    width: 1366px;
    height: 42px;
    margin: 24px auto;
}
header .logo{
    float: left;
}
header .nav{
    float: left;
    height: 42px;
    margin-left: 50px;
}
header .nav ul{
    list-style: none;
}
header .nav li{
    float: left;
}
header .nav li a{
    display: block;
    padding: 0 10px;
    height: 30px;
}
header .nav li a:hover{
    border-bottom: 2px solid #00a4ff;
}
a{
    text-decoration: none;
    color: #050505; 
}
input{
    border: 0;
    box-sizing: border-box;
}
header .search{
    position: relative;
    width: 410px;
    height: 38px;
    float: left; 
    margin-left: 220px;
}
header .search input.box{
    width: 410px;
    height: 38px;
    padding-left: 10px;border: 2px solid #00a4ff; 
}
header .search input.commit{
    position: absolute;
    top: 0;
    right: -16px;
    width: 50px;
    height: 38px;
    background: #00a4ff url(../images/search_06.png) center center no-repeat;
    list-style: none;
}
header .profile{
    float: right;
    height: 42px;
    line-height: 42px;
    margin: 0 15px 0 35px;
}
header .profile img{
    margin: 0 15px;
}